Value Collection -33617-1 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION -33617-1 is a hex socket cap screw designed for fastening applications requiring a compact drive profile and high tensile strength. Sized at 5/16-18 UNC with a 3/4-inch length under head, this fastener is fully threaded and driven by a 1/4-inch hex key. It is manufactured from alloy steel and finished with a black oxide coating, which provides moderate corrosion resistance and reduces light reflection. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for structural and mechanical assemblies across industrial, HVAC, and general trade applications.

This fastener is used in residential and commercial mechanical assemblies where a low-profile socket drive head is required. Typical applications include equipment panels, mounting brackets, machinery frames, and HVAC unit components. The 5/16-18 UNC thread form is a standard coarse-thread specification, compatible with tapped holes and nuts of the same designation. Installers in HVAC, plumbing, electrical, and general mechanical trades commonly use this screw when access space limits the use of hex head or Torx fasteners.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes and hardware
• 3/4-inch length under head, fully threaded for maximum thread engagement
• 1/4-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and a non-reflective surface
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 5/16-18 UNC hex socket cap screw for use in any application requiring an ASME/ANSI B18.3-compliant fastener with a 1/4-inch hex drive.

Installation Notes

Installation requires a 1/4-inch hex key or Allen bit driver. Ensure the mating tapped hole or nut is clean and free of debris before driving. Do not exceed the rated torque range for 5/16-18 alloy steel fasteners as specified by the applicable mechanical or equipment code. Black oxide finish is not a substitute for a rust-inhibiting coating in wet or outdoor environments without additional protection.